Non-emulsifying anti-sludge composition for use in the acid treatment of hydrocarbon wells
View Patent ↗A composition for inhibiting or preventing the formation of emulsions in the presence of treating acids during the acid stimulation of hydrocarbon wells is provided. The composition includes an alkyl aryl sulfonic acid or salt thereof, an acetylenic alcohol, an alkyl diphenyl oxide sulfonic acid or derivative thereof, in an alkyl alcohol solvent. The disclosed compositions can be used in an acid treatment solution, such as 15% hydrochloric acid, to prevent and resolve live acid and spent acid emulsions for a wide range of crude oils.
1. A method for acid treating a hydrocarbon well formation, comprising:
preparing an acid solution comprising an acid and a composition comprising:
dodecyl benezenesulfonic acid in the range of about 40 to about 50 percent by volume;
propargyl alcohol in the range of about 7.5 to about 12.5 percent by volume;
alkyl diphenyl oxide sulfonic acid or derivative thereof in the range of about 5 to about 10 percent by volume;
in an alkyl alcohol solvent, and
treating the hydrocarbon well formation with the acid solution.
2. The method at claim 1 wherein the alkyl diphenyl oxide sulfonic acid or derivative thereof is a material having a hexyl alkyl group.
3. The method of claim 1 wherein the alkyl alcohol solvent is methanol.
4. The method of claim 1 , wherein the alkyl alcohol solvent is a lower alkyl monohydric alcohol.
5. The method of claim 1 , wherein the acid comprises 15 wt.% hydrochloric acid.
6. The method of claim 1 , wherein the composition further comprises an iron control agent.
7. The method of claim 6 , wherein the iron control agent is present at an iron control level of 5000 ppm ferric ion.
8. The method of claim 1 , wherein the composition further comprises an additional anionic surfactant.